Electronic time relay, delayed response, with semiconductor output, time range 0.05-100 s, AC/DC 24-240 V, 50/60 Hz. Integrated varistor for damping the contactor coils. Spring terminal connection, snap-on at the front for contactors 3RT201 / 3RT202 and auxiliary contactors 3RH2. Function module SIRIUS 3RA28 for direct start, designed for mounting on contactors 3RT2 and auxiliary contactors 3RH2 for time-delayed switching operations in control, starting, protection, and regulation circuits, e.g., cascaded motor starting or fan run-on control. The simple and tool-free snap-on feature allows for the realization of control-independent time functions without additional wiring. This helps avoid wiring errors and reduces testing costs. By mounting at the front of the devices, space on the DIN rail is saved. An additional protective circuit is not required. The devices are globally applicable thanks to international approvals (e.g., IEC, CCC, UL/CSA). The function modules are available for contactors 3RT2 and auxiliary switches 3RH2 in sizes S00 to S3. Available with a flexible wide voltage range AC/DC 24-240 V, selectable outputs 1 S + 1 Ö or 1 W, and in screw or spring terminal connection technology. Wiring kits and a sealable cover are available for the function modules. SIRIUS relays - a program for all cases.